body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f7f9;
    color: #333;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
}

.app-container {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 1000px;
}

h1 {
    color: #2c3e50;
    font-size: 2.2rem;
    margin-bottom: 20px;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 10px;
    text-align: center;
}

/* Menu de Navegação */
.nav-menu {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}
.nav-btn {
    background: #e0e0e0;
    border: none;
    padding: 15px 25px;
    cursor: pointer;
    font-size: 1rem;
    color: #555;
    border-radius: 8px;
    margin: 0 10px;
    transition: all 0.3s ease;
}
.nav-btn.active {
    background-color: #007bff;
    color: white;
    box-shadow: 0 4px 8px rgba(0, 123, 255, 0.3);
}

/* Painéis de Ferramentas */
.tool-panel {
    display: none;
}
.tool-panel.active {
    display: block;
}

h2 {
    color: #007bff;
    text-align: center;
    margin-bottom: 20px;
}

/* Formulários e Inputs */
.form-section {
    margin-bottom: 20px;
}
.form-section label, .table-header {
    font-weight: bold;
    color: #555;
}
input[type="text"], input[type="date"], input[type="number"], textarea {
    width: 100%;
    padding: 10px;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-sizing: border-box;
    margin-top: 5px;
}
.status-msg {
    margin-top: 10px;
    font-weight: bold;
    color: #28a745;
    text-align: center;
}

/* Ishikawa */
.ishikawa-factors {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    gap: 20px;
}
.factor-column {
    flex-basis: calc(33.33% - 20px);
    text-align: left;
}
.factor-column h3 {
    text-align: center;
    color: #2c3e50;
}
.factor-input {
    min-height: 100px;
}

/* 5W2H */
.table-5w2h {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 15px;
    align-items: center;
}
.table-header {
    background-color: #f0f0f0;
    padding: 10px;
    border-radius: 5px;
    text-align: center;
}

/* Pareto */
.pareto-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}
.pareto-item input { flex: 1; }
.pareto-item .problema { flex: 3; }
.pareto-item .frequencia { flex: 1; }
.pareto-item button {
    background-color: #dc3545;
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
}
#add-pareto-item {
    background-color: #28a745;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 10px;
}
#generate-pareto, #save-ishikawa, #save-5w2h {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 12px 20px;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 20px;
    width: auto;
}
.chart-container {
    margin-top: 30px;
    height: 400px;
}
.pareto-analysis {
    text-align: left;
    margin-top: 20px;
    border-top: 1px solid #e0e0e0;
    padding-top: 20px;
}